... Saturns Moon Rhea from Cassini . ... Each moon of Saturn seems to come with its own mystery. ... The Rosette Nebula . ... The bland New General Catalog designation of NGC 2237 doesn't appear to diminish the appearance of the this flowery emission nebula. Inside the nebula lies an open cluster of bright young stars designated NGC 2244. ... The Virgo Cluster is so close that it spans more than 5 degrees on the sky - about 10 times the angle made by a full Moon. ... NGC 3132: The Eight Burst Nebula . ...